856788 has 12 divisors (see below), whose sum is σ = 1999200. Its totient is φ = 285592.

The previous prime is 856787. The next prime is 856789. The reversal of 856788 is 887658.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (856787) and next prime (856789).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35688 + ... + 35711.

It is an arithmetic number, because the mean of its divisors is an integer number (166600).

2⁸⁵⁶⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

856788 is an abundant number, since it is smaller than the sum of its proper divisors (1142412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856788 is a wasteful number, since it uses less digits than its factorization.

856788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71406 (or 71404 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 856788 is about 925.6284351726. The cubic root of 856788 is about 94.9783145332.

The spelling of 856788 in words is "eight hundred fifty-six thousand, seven hundred eighty-eight".